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1. Compute SHA-256 of OTSCanonicalRecord value → must equal OTSHash 2. Open OTSProofURL → extract Bitcoin block number → must equal OTSBitcoinBlock 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Read CopyrightID inside OTSCanonicalRecord → must equal the CopyrightID above 5. GET OTSVerificationAPI → pre-computed 6-check result from server 6. If all match: this entity was registered on CopyrightChains at OTSTimestamp, independently verifiable on Bitcoin Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x309a4e288858c66ad2347986dc087934fecc76c7a2aa80956d3d65aacfe060b3. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/b052e7d2-1aee-4929-875d-e99465bb896d.json and https://artists.proofprofile.net/proofs/artist/b052e7d2-1aee-4929-875d-e99465bb896d.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0103f0e319baa7ef1f6347b5b36dcc95af08cfa1121ba6727c0ea0db9e3eb7f2. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/BX5EU2200074.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa176d89ef41657f53f0f84f62194ff41739203591cb1d79e44b44f5d9db69c0. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZNJX2489460.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf88561ed2d7aac01461e6af8964c90e932f20419d40d055a288bcf0d164aae7e. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZNJX2489461.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ae82c3f93397749077279e417041165ce674cdf955d25df6d257699ada191fd. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZNJX2479665.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x312e3d6b43777385cd442e7dc6a4b484816926fa82ca11f80bd46bb19c9aa78c. Chain 2 (Bitcoin): anchored in block 960185 (2026-07-30T01:32:48Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZNJX2489464.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x380efd03664914e2b75e5943943c549997b573cfed0fc919eaa7e81c1c0c356a. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZ5AB2435795.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6aaa4ec2e9b9ede5da0a15255fcbd056323af4f9f5022f54768bfe63bf767480. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZNJX2489466.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79dbbb3d8e0835d6fda4545f96d93e117c272b759129ae091c8e4d0a7d2d480c. Chain 2 (Bitcoin): anchored in block 960291 (2026-07-30T18:23:33Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/BKDP52300019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3fba93e8555c0e94d6ef8798035a7bc505134e018ba835c4fc173192d51d4aa. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/BKDP52300020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff0252cbad8ea2ea058142a20dd17977d029f8dde1ce5746141429d93e94ef64. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/BKDP52300021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6ef9d05d95f92089e6517aec7d85794cb46d809d921db874e3a3fbf049220ee. Chain 2 (Bitcoin): anchored in block 960473 (2026-07-31T22:27:44Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/BKDP52300022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa728def2b7b28a016ce4b4146084089119cfe96791b7b9fa315398f1887416b5. Chain 2 (Bitcoin): anchored in block 960468 (2026-07-31T21:25:57Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/BKDP52300026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1c2517a194d007291d6f64a32c64f28a6cebaad5598eff24a2712179491ce65. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/BKDP52300028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ae82c3f93397749077279e417041165ce674cdf955d25df6d257699ada191fd. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZNJX2479665.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x380efd03664914e2b75e5943943c549997b573cfed0fc919eaa7e81c1c0c356a. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZ5AB2435795.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff779a5dd4054dce879ca58fbd0b3d21956e6c4288594cd43de4a5a0f121097c. Chain 2 (Bitcoin): anchored in block 960410 (2026-07-31T13:50:38Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/BXYW72300001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b8adb671fed7f0d0dd2feb8aa25aaf2f9120f8afeb75f6f6f00da5429590496. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZW9K2381209.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8aa7707ce05619173b0f37320d12fbdbb0cffa8a6389f42289e42c0b03ad9d1b. Chain 2 (Bitcoin): anchored in block 960403 (2026-07-31T13:04:34Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZNJV2375739.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d49a6fabe78f93bff2f6d1295f39d3147dd4a622de1e34ee5805bc48aa25076. Chain 2 (Bitcoin): anchored in block 960362 (2026-07-31T06:58:00Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/BX5EU2200157.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0debfa5068c1015e80a4e4b1d156fa49f489b4c6c2bf5ef02a5c453b9e553ed2. Chain 2 (Bitcoin): anchored in block 960463 (2026-07-31T20:42:35Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/BKLUI2200001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x045601ad727bbf3f7d32c8ecc5e08cbd80d402b85f3325e5b52a38be4961ac3c. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T17:48:40Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/BRWMB2200301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ee3245a68667552aff0a5839e47d2e0adc131f42c23a70cc0fd68d0d5704aba. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/BX5EU2100076.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4c7d3cf1651f862a80703805bb2674450b8b30555c96b9af63527696bcda83b. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/BR5TG2101852.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5b6aefcec40abbf15183302c84738887c2fb69f520747b690ddbfc280fbbfeb. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/BCDFI2100021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9411b0dfd2430b9d97b83cf12b09868e8e8bbd1323d85c9d1363d5301d8cd64d. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/BX5EU2100010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea6395189d9e106c92afdbce0158d32b789afd48c7cc523c27297340089c7097. Chain 2 (Bitcoin): anchored in block 960340 (2026-07-31T03:15:04Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/BX5EU2100008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27282f6ba7dbabb7b1a9fa1253720a869aa95d19b91df6f71a99f2ef4de38931. Chain 2 (Bitcoin): anchored in block 960506 (2026-08-01T03:50:58Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/BX5EU2100011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12b17070ea53ee29107c20e2a8d21b74fa232b2eb48e1464a883b4c9131156f7. Chain 2 (Bitcoin): anchored in block 960506 (2026-08-01T03:50:58Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/BX5EU2100009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10ccbf65cc4b3324c8bafcae859dddc1b73c827ad9d68f0acb246cf3c5f11338. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/BX5EU2100012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8896d01bb8a907d9dfb87d55f453a579604cfb54d5146c9ce9486cf64033c4a0. Chain 2 (Bitcoin): anchored in block 960250 (2026-07-30T11:13:28Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZNJX2060751.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfffc3c3cdf4d60d71e821039a061dfd24bdd4384e37a9edc9dd4f3e899cea637. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZNJV2087358.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81226405d26c42c94c874f6c25c09f672afd1f2e5341c39a5e059082d5511aa7. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZGLM1901195.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ed8df49cd0eaa5da359a2e8022f84416217d8d2d1b957888d3b193814513ff9. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZGLS1948265.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf40f8578a6aa5ffa2f66dff55c4adceae9c6d8904ba85771fe3d612a22ffa99e. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/BKNNO2200014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x844339038aca29ba9a13b9c95e58d83a57087c7f0df1b6174a2dcfb62659fb7a. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZNJX2024986.